CONVERT doesn’t specify which “cup” or “tablespoon” version to use
Possibly provide a link to the NIST definitions: http://physics.nist.gov/Pubs/SP811/appenB9.html#VOLUME

Provide this information.

Part 4, 3.17.7.48

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Proposed Disposition of DIS 29500 Comment ECMA-0027 (Modified: 2008-01-13) We agree that several of the measures inside the CONVERT function are ambiguously defined. We will make the following changes: Part 4, §3.17.7.48, page 2,572, line 17 Description: Converts a number from one measurement system to another. Part 4, §3.17.7.48, page 2,575, the first table Liquid Measure Unit String Meaning Cup Traditional U.S. Cup (1/2 U.S. pint) Gal U.S. Gallon l or lt Liter Oz U.S. Fluid ounce Pt or us_pt U.S. pint Qt U.S. Quart Tbs Traditional U.S. Tablespoon (1/2 U.S. fluid ounce) Tsp Traditional U.S. Teaspoon (1/6 U.S. fluid ounce) uk_pt U.K. pint Part 1, §3, “Normative References”, add the following: “NIST Guide to SI Units”, http://physics.nist.gov/Pubs/SP811/appenB9.html Similar Comments: AU-0028 , CL-0180 , CO-0172 , FR-0503 , GB-0384 , IE-0006 , MT-0003 , PH-0004 , US-0183 , UY-0012